Sludge flushing and discharging system

Abstract

The invention discloses a sludge flushing and discharging system which comprises a sludge flushing and discharging pipeline and at least one pressure difference measuring pipeline, wherein the sludge flushing and discharging pipeline is communicated with a main pipeline of a common seawater cooling system; the pressure difference measuring pipeline is used for detecting the pressure difference between two point positions of the main pipeline; the sludge flushing and discharging pipeline comprises at least two sludge collectors; the sludge collector is located at the inlet end of the sludge flushing and discharging pipeline, and a sludge collecting cavity used for being communicated with the main pipeline is defined in the sludge collector. The pressure difference measuring pipeline is arranged between the two sludge collectors and is communicated with the two point positions of the main pipeline through the two sludge collectors. According to the invention, accumulation of sludge impurities in a common seawater cooling system can be avoided, and pressure difference measurement work between two point positions of the common seawater cooling system can be carried out.

Description

Technical Field

[0001] The invention relates to the field of nuclear power technology, and in particular to a sludge flushing and drainage system. Background Art

[0002] Instruments are widely used in various systems of nuclear power plants to monitor various parameters such as pipeline pressure in the system. Once a failure occurs, it will affect the safety, stability and normal operation of the system. In general seawater cooling systems, there are tiny marine organisms and silt impurities in the medium circulating inside.

[0003] At present, in general seawater cooling systems, silt filtering equipment is generally installed upstream to filter impurities in the internal circulation medium. However, due to its filtering accuracy of 3mm, it cannot filter impurities with a diameter less than 3mm, and cannot completely intercept the mud and shellfish residues in the seawater medium. During the operation process, with the operation of the general seawater cooling system, silt is easy to accumulate in the system.

[0004] At the same time, during the operation, a pressure differential measuring instrument needs to be installed on the general seawater cooling system to detect the pressure difference between two points in the general seawater cooling system, so as to understand the operation of the system and promptly discover and deal with abnormal working conditions. The setting of the pressure differential measuring instrument generally requires parallel branch pipes. This setting method causes the uninterrupted residual impurities in the general seawater cooling system to accumulate in the branch pipe where the pressure differential measuring instrument is located. As the operating time increases, the corrosion products and media in the system gradually accumulate and clog the pressure port, affecting the transmission of pressure and eventually leading to false alarms of the instrument. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an improved sludge flushing and discharge system.

[0006] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0007] Construct a sludge flushing system, including:

[0008] A sludge flushing pipeline for connecting to a main pipeline of a general seawater cooling system, the sludge flushing pipeline comprising at least two sludge collectors; the sludge collectors are located at the inlet end of the sludge flushing pipeline and define a sludge collecting chamber for connecting to the main pipeline; and

[0009] At least one differential pressure measuring pipeline is used to detect the differential pressure between two points of the main pipeline. The differential pressure measuring pipeline is arranged between the two sludge collectors and is connected to the two points of the main pipeline through the two sludge collectors.

[0010] In some embodiments, the sludge collector includes a main shell and an instrument pipe; the main shell is vertically arranged and defines the sludge collection chamber; the instrument pipe is arranged on the side wall of the main shell and is connected to the sludge collection chamber; the upper end of the main shell is connected to the main line, and the differential pressure measurement line is connected to the instrument pipe.

[0011] In some embodiments, the main housing has at least one sludge observation window on its side wall.

[0012] In some embodiments, the sludge collector also includes a connecting pipe, a first reducer and a second reducer, the first reducer is connected between the main line and the connecting pipe, the second reducer is connected between the connecting pipe and the main shell; the diameter of the connecting pipe is smaller than the diameter of the main line and the main shell.

[0013] In some embodiments, the connecting pipe is tilted, and the tilt angle is less than or equal to 45°.

[0014] In some embodiments, the sludge collector further includes a sludge level sensor for detecting the height position of sludge in the sludge collection chamber, and the sludge level sensor is disposed on the main shell.

[0015] In some embodiments, the sludge flushing pipeline also includes a sludge flushing pipe, a sewage pump and a sludge temporary storage box. The sludge flushing pipe is connected to the lower end of the at least one sludge collector, and the sewage pump and the sludge temporary storage box are arranged on the sludge flushing pipe; the mud level sensor is electrically connected to the sewage pump.

[0016] In some embodiments, the differential pressure measurement pipeline includes at least one switch pressure gauge and at least one analog pressure gauge, and the switch pressure gauge and the analog pressure gauge are arranged in parallel;

[0017] The number of the instrument connecting pipes is at least two, and the ends of the at least one switch pressure gauge and the at least one analog pressure gauge are respectively connected to the sludge collection chamber through at least two of the instrument connecting pipes.

[0018] In some embodiments, the sludge flushing system further comprises a backwashing pipeline for backwashing the sludge flushing pipeline, and an outlet end of the backwashing pipeline is connected to the sludge flushing pipeline.

[0019] In some embodiments, the main line includes a main pipeline, a backwash filter, and a heat exchanger located downstream of the backwash filter, and the backwash filter and the heat exchanger are both disposed on the main pipeline;

[0020] The differential pressure measuring pipeline includes a first differential pressure measuring pipeline and a second differential pressure measuring pipeline. The first differential pressure measuring pipeline is used to detect the pressure difference between the main pipelines at both ends of the backwash filter. The second differential pressure measuring pipeline is used to detect the pressure difference between the main pipelines at both ends of the heat exchanger.

[0021] The implementation of the embodiments of the present invention has at least the following beneficial effects:

[0022] The present application can realize the silt collection function and avoid the accumulation of silt impurities in the general seawater cooling system by setting up a silt flushing pipeline for connecting with the general seawater cooling system.

[0023] The present application provides a pressure difference measurement pipeline, so as to realize the sludge collection of a general seawater cooling system and perform the pressure difference measurement between two points of the general seawater cooling system.

[0024] By setting up at least two sludge collectors and setting the differential pressure measuring pipeline between the two sludge collectors, the present application can allow the circulating medium to collect sludge through the sludge collectors before entering the differential pressure measuring pipeline, thereby avoiding the accumulation of sludge impurities in the main line in the differential pressure measuring pipeline, thereby ensuring the pressure monitoring of the differential pressure measuring pipeline and meeting the requirements for safe and stable status monitoring of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0026] Figure 1 A schematic diagram of the pipeline connection of a sludge flushing and drainage system in one embodiment of the present application;

[0027] Figure 2 yes Figure 1 Schematic diagram of the structure of the sludge collector. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific implementation methods of the present application are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present application.

[0029] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0030] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0031] Figure 1 A sludge flushing system 1 in an embodiment of the present application is shown, which acts on a general seawater cooling system. The general seawater cooling system includes a main line 2, which can transmit the medium during the operation of the nuclear power plant. The sludge flushing system 1 includes a sludge flushing pipeline 40 and at least one differential pressure measuring pipeline. Among them, the differential pressure measuring pipeline is used to detect the pressure difference between two points of the main line 2. The sludge flushing pipeline 40 is used to discharge and temporarily store sludge and other media in the system to avoid accumulation in the differential pressure measuring pipeline.

[0032] Specifically, one end of the sludge flushing and discharging pipeline 40 is connected to the main pipeline 2, and includes at least two sludge collectors 42. The sludge collector 42 is used to collect and temporarily store sludge to prevent sludge from accumulating and clogging in the pipeline. It is located at the inlet end of the sludge flushing and discharging pipeline 40, and a sludge collection chamber 420 is defined inside. The sludge collection chamber 420 is connected to the main pipeline 2 so that the sludge transmitted by the main pipeline 2 can enter.

[0033] The pressure difference measuring pipeline is arranged between the two sludge collectors 42 , and its two ends are respectively connected with two points of the main pipeline 2 through the two sludge collectors 42 .

[0034] It should be understood that "two points" can be any two different points on the main line 2, which only means that the two connection positions where the two ends of the differential pressure measurement pipeline are respectively connected to the main line 2 are different positions to achieve the function of differential pressure measurement.

[0035] The present application can collect sludge in the general seawater cooling system by setting up a sludge flushing pipeline 40 connected to the general seawater cooling system, thereby preventing sludge from accumulating in the general seawater cooling system.

[0036] The present application sets up a pressure difference measuring pipeline, so that the present application can not only collect sludge in a general seawater cooling system, but also realize the pressure difference measurement between two points in the general seawater cooling system.

[0037] The present application sets at least two sludge collectors and sets the differential pressure measuring pipeline between the two sludge collectors 42, so that the differential pressure measuring pipeline can be connected to the main line 2 of the general seawater cooling system through the sludge collector 42. The sludge collector 42 can collect sludge, so that the circulating medium in the general seawater cooling system can be first collected by the sludge collector 42 before entering the differential pressure measuring pipeline. It prevents the sludge and other impurities in the main line 2 from accumulating in the differential pressure measuring pipeline, thereby ensuring the pressure monitoring of the differential pressure measuring pipeline and meeting the requirements of the instrument to carry out status monitoring safely and stably.

[0038] It should be understood that the main line 2 of the general seawater cooling system includes a main pipeline 201, a seawater pump 202, a heat exchanger 203, a backwash filter 204 and a system pressure gauge 205. The seawater pump 202 is arranged upstream of the main pipeline 201, and the system pressure gauge 205 is arranged between the seawater pump 202 and the heat exchanger 203. The heat exchanger 203 is used to exchange heat between the circulating medium and the medium of the equipment cooling water system (RRI). The backwash filter 204 is arranged between the heat exchanger 203 and the system pressure gauge 205, and is used to filter the sludge impurities of the backwashing.

[0039] In some embodiments, the sludge flushing and drainage system 1 may further include a backwashing pipeline 50 , the outlet end of which is connected to the sludge flushing and drainage pipeline 40 for performing backwashing operations to avoid blockage of the sludge flushing and drainage pipeline 40 .

[0040] In this embodiment, the number of the differential pressure measuring pipelines is two, which are now defined as the first differential pressure measuring pipeline 20 and the second differential pressure measuring pipeline 30. The number of sludge collectors 42 in the sludge flushing pipeline 40 is correspondingly set to four. The two ends of the first differential pressure measuring pipeline 20 are connected to the main pipeline 201 at the two ends of the backwash filter 204 through the two sludge collectors 42. The two ends of the second differential pressure measuring pipeline 30 are connected to the main pipeline 201 at the two ends of the heat exchanger 203 through the remaining two sludge collectors 42.

[0041] The sludge collector 42 connected to the inlet end of the first differential pressure measuring pipeline 20 is now defined as the first sludge collector 4201, and the sludge collector 42 connected to the outlet end of the first differential pressure measuring pipeline 20 is defined as the second sludge collector 4202. The sludge collector 42 connected to the inlet end of the second differential pressure measuring pipeline 30 is defined as the third sludge collector 4203, and the sludge collector 42 connected to the outlet end of the second differential pressure measuring pipeline 30 is defined as the fourth sludge collector 4204.

[0042] It should be understood that a differential pressure measuring pipeline and / or a sludge collector 42 may also be provided at other locations of the main pipeline 201 , and a sludge collector 42 may be provided at any location with a risk of sludge deposition.

[0043] The pressure difference measurement pipeline includes at least one switch pressure gauge and at least one analog pressure gauge. The switch pressure gauge and the analog pressure gauge are arranged in parallel. Each pressure gauge can independently measure the pressure difference between two points on the main pipeline 201.

[0044] Specifically, the first differential pressure measuring pipeline 20 includes a first switch pressure pipeline 21, a first analog pressure pipeline 22, a first switch pressure gauge 23 and a first analog pressure gauge 24. The first switch pressure pipeline 21 and the first analog pressure pipeline 22 are arranged in parallel, and the first ends of both are connected to the main pipeline 201 at the inlet end of the backwash filter 204 through a sludge collector 42. The second ends are connected to the main pipeline 201 at the outlet end of the backwash filter 204 through another sludge collector 42. The first switch pressure gauge 23 is arranged on the first switch pressure pipeline 21. The first analog pressure gauge 24 is arranged on the first analog pressure pipeline 22.

[0045] The second differential pressure measuring pipeline 30 includes a second switch pressure pipeline 31, a second simulated pressure pipeline 32, a third switch pressure pipeline 33, a second switch pressure gauge 34, a second simulated pressure gauge 35 and a third switch pressure gauge 36. The second switch pressure pipeline 31, the second simulated pressure pipeline 32 and the third switch pressure pipeline 33 are arranged in parallel, and the first ends of the three are connected to the main pipeline 201 at the inlet end of the heat exchanger 203 through the third sludge collector 42. The second ends are connected to the main pipeline 201 at the outlet end of the heat exchanger 203 through the fourth sludge collector 42. The second switch pressure gauge 34 is arranged on the second switch pressure pipeline 31. The second simulated pressure gauge 35 is arranged on the second simulated pressure pipeline 32. The third switch pressure gauge 36 is arranged on the third switch pressure pipeline 33.

[0046] It should be understood that the first switch pressure gauge 23, the second switch pressure gauge 34 and the third switch pressure gauge 36 all use existing switch pressure measuring instruments, which sense the pressure and convert 0 / 1 signals to achieve the response action of other system devices electrically connected thereto. The first analog pressure gauge 24 and the second analog pressure gauge 35 all use existing analog pressure measuring instruments to monitor the pressure in real time, convert different pressures into electrical signals of different currents, and continuously output signal values ​​to sound an alarm when the pressure is greater than or less than a specific value.

[0047] like Figure 2 As shown, in some embodiments, the sludge collector 42 includes a main housing 421 and an instrument pipe 426. The main housing 421 is vertically arranged, and defines the sludge collection chamber 420. The upper end of the main housing 421 is connected to the main line 2, so that the medium flowing through the main line 2 can enter the chamber from the upper end of the sludge collection chamber 420. Then, the sludge and other impurities therein can fall to the bottom of the sludge collection chamber 420 by their own gravity, so as to separate the circulating medium from the sludge impurities, and realize the sludge collection effect of the sludge collector 42.

[0048] The instrument connecting pipe 426 is arranged on the side wall of the main housing 421, connected to the sludge collecting chamber 420, and used to connect the differential pressure measuring pipeline. The circulating medium in the main line 2 first enters the sludge collector 42 from the top of the sludge collecting chamber 420, so as to separate the circulating medium from the sludge impurities. Furthermore, the circulating medium enters the differential pressure measuring pipeline through the instrument connecting pipe, which avoids the accumulation of sludge medium in the differential pressure measuring pipeline and ensures the stability of the pipeline connection between the main line 2 and the differential pressure measuring pipeline.

[0049] Furthermore, the instrument pipe 426 can be disposed at an upper position of the side wall of the main housing 421 to prevent sludge from accumulating at the height of the instrument pipe 426 and causing blockage of the instrument pipe 426 .

[0050] At the same time, the instrument pipe 426 can also be arranged horizontally. Since the circulating medium enters from the top of the main housing 421, it moves downward in the sludge collection chamber 420 by its own gravity. Therefore, the instrument pipe 426 located at the upper position and arranged horizontally can change the circulation direction of the medium. After the fluid mixed with sludge impurities and the medium enters the sludge collection chamber 420 from the vertical direction downward, the circulating medium changes direction and enters the horizontally arranged instrument pipe 426, while the sludge impurities sink by their own gravity, realizing diversion, and further reducing the possibility of sludge impurities entering the instrument pipe 426.

[0051] Furthermore, an isolation valve 428 may be provided on the instrument pipe 426 .

[0052] In some other optional embodiments, the setting angle of the instrument pipe 426 can also be slightly inclined.

[0053] In some other optional embodiments, the connection position between the main line 2 and the main shell 421 can also be located in the lower middle part of the main shell 421 or near the bottom. By means of inclined downward access or horizontal access, the sludge impurities move downward and are deposited at the bottom of the sludge collection chamber 420, thereby achieving separation of sludge and fluid medium.

[0054] In some embodiments, the number of the instrument pipes 426 is at least two, so that the ends of the switch pressure gauge and the analog pressure gauge of the differential pressure measuring pipeline can be connected to the sludge collection chamber 420 through separate instrument pipes 426, thereby achieving connection with the main pipeline 201.

[0055] In this embodiment, the first sludge collector 4201 and the second sludge collector 4202 each include two instrument pipes 426 , and the third sludge collector 4203 and the fourth sludge collector 4204 each include three instrument pipes 426 .

[0056] Take the third sludge collector 4203 as an example for explanation:

[0057] The three instrument pipes 426 are defined as the first instrument pipe 4261, the second instrument pipe 4262 and the third instrument pipe 4263. The first instrument pipe 4261 is connected to one end of the second switch pressure pipeline 31, the second instrument pipe 4262 is connected to one end of the second simulation pressure pipeline 32, and the third instrument pipe 4263 is connected to one end of the third switch pressure pipeline 33. The first instrument pipe 4261, the second instrument pipe 4262 and the third instrument pipe 4263 are all provided with isolation valves 428.

[0058] The first sludge collector 4201, the second sludge collector 4202 and the fourth sludge collector 4204 are similar and will not be described in detail here.

[0059] It should be understood that when there are multiple instrument tubes 426, they can be arranged at the same height position of the main housing 421, or at different height positions of the main housing 421. They can be evenly spaced along the circumference of the main housing 421, or they can be arbitrarily arranged along the circumference of the main housing 421. No specific limitation is made here.

[0060] In this embodiment, the main housing 421 is substantially in the shape of a vertically elongated cylinder, and has at least one sludge observation window 4211 on its side wall. The sludge observation window 4211 can be used to observe the amount of sludge accumulated in the sludge collecting chamber 420 to prevent the sludge from filling the entire sludge collecting chamber 420 and causing blockage.

[0061] The sludge observation window 4211 can be arranged in a longitudinal direction; or it can be arranged in a plurality and distributed at different heights to ensure that the conditions at different heights in the sludge collection chamber 420 can be observed.

[0062] When there are multiple sludge observation windows 4211, each sludge observation window 4211 can also be arranged in a longitudinal direction and distributed at different circumferential positions of the main housing 421, so as to facilitate observation.

[0063] It should be understood that the sludge observation window 4211 can be made of glass or polymer transparent materials to achieve a transparent observation effect.

[0064] In some other optional embodiments, the main housing 421 may also be in other shapes such as a box shape. It should be understood that the shape setting can be set as long as a certain height space can be met to achieve the sedimentation and collection of sludge.

[0065] In some embodiments, the sludge collector 42 further includes a connecting pipe 422, a first reducer 423, and a second reducer 424. The diameter of the connecting pipe 422 is smaller than the diameters of the main line 2 and the main housing 421. Since the main pipeline 201 of the main line 2 is relatively thick, the use of a small-diameter connecting pipe 422 can facilitate the on-site layout of the pipeline and reduce the space occupied. At the same time, for the consideration of seismic design, the suspended pipeline needs to be equipped with a hanger for shock absorption. The small-diameter connecting pipe 422 is light in weight, which is convenient for setting structures such as hangers.

[0066] The first reducer 423 is connected between the main pipe 201 and the connecting pipe 422, with its large diameter end connected to the main pipe 201 and its small diameter end connected to the first end of the connecting pipe 422. The second reducer 424 is connected between the connecting pipe 422 and the main housing 421, with its small diameter end connected to the second end of the connecting pipe 422 and its large diameter end connected to the upper end of the main housing 421.

[0067] To achieve the connection of the pipeline, the sludge collector 42 also includes two connecting flanges 425. One of them is arranged between the main pipeline 201 and the first reducer 423, and the other is arranged between the main housing 421 and the pipeline of the downstream sludge flushing pipeline 40. Among them, the connecting flange 425 between the main pipeline 201 and the first reducer 423 can be a reducing flange. The connecting flange 425 arranged between the main housing 421 and the pipeline of the downstream sludge flushing pipeline 40 can be a common flange.

[0068] Furthermore, the connecting pipe 422 is tilted to meet the requirement that the branch pipe connected to the main pipe 201 needs to be tilted, and at the same time, it is convenient for the sludge impurities to sink. The tilt angle is less than or equal to 45°.

[0069] For example Figure 1 As shown, in some embodiments, the sludge collector 42 further includes a sludge level sensor 427 for monitoring the height of the sludge deposited in the sludge collection chamber 420 to prevent excessive sludge deposition and failure to be observed in time from the sludge observation window 4211. The sludge level sensor 427 is disposed on the main housing 421.

[0070] Specifically, the mud level sensor 427 can be a patch sensor, which is arranged on the outer wall of the main housing 421, and analyzes the mud level height through ultrasonic emission and the echo of solid particles in the water, thereby realizing mud level monitoring. It can also use other types of sensors, which are connected to the sludge collection chamber 420 through instrument pipes and other connecting pipes to realize mud level monitoring.

[0071] It should be understood that when it is necessary to extend into the sludge collection chamber 420 to monitor the mud level, the number of instrument pipes needs to be increased accordingly. The mud level sensor 427 can adopt existing technology.

[0072] In some embodiments, the sludge flushing pipeline 40 includes a sludge flushing pipeline 41, a sewage pump 43 and a sludge temporary storage box 45. The sludge collector 42 is arranged at the inlet end of the sludge flushing pipeline 41. The sewage pump 43 and the sludge temporary storage box 45 are arranged on the sludge flushing pipeline 41, and the sludge temporary storage box 45 is arranged at the outlet end of the sludge flushing pipeline 41, and is used to temporarily store the discharged sludge impurities. The sewage pump 43 is arranged between the sludge temporary storage box 45 and the sludge collector 42, and is used to pump out the sludge in the sludge collector 42.

[0073] Specifically, the inlet end of the sludge flushing and discharge pipe 41 is connected to the lower end of the main shell 421 of the sludge collector 42 through a connecting flange 425, so that impurities located at the bottom of the sludge receiving chamber 420 can flow out smoothly.

[0074] The sewage pump 43 can also be electrically connected to the mud level sensors 427 on the four sludge collectors 42 respectively to achieve automatic discharge of sludge.

[0075] In this embodiment, the sludge flushing and drainage pipeline 41 includes a main pipeline 411, a first branch pipeline 412, a second branch pipeline 413, a third branch pipeline 414 and a fourth branch pipeline 415. Among them, the inlet end of the first branch pipeline 412 is connected to the first sludge collector 4201. The inlet end of the second branch pipeline 413 is connected to the second sludge collector 4202. The inlet end of the third branch pipeline 414 is connected to the third sludge collector 4203. The inlet end of the fourth branch pipeline 415 is connected to the fourth sludge collector 4204. The outlet ends of the first branch pipeline 412, the second branch pipeline 413, the third branch pipeline 414 and the fourth branch pipeline 415 are respectively connected to the inlet end of the main pipeline 411. The outlet end of the main pipeline 411 is connected to the sludge temporary storage box 45. The sewage pump 43 is arranged on the main pipeline 411.

[0076] In some embodiments, the first branch pipe 412, the second branch pipe 413, the third branch pipe 414 and the fourth branch pipe 415 are also provided with drain valves 46, which can select different numbers of sludge collectors 42 for draining when the flow rate of the general seawater cooling system is low, thereby reducing the impact of flow fluctuations on the system.

[0077] The drain valve 46 may be a butterfly valve to achieve free adjustment of the opening to facilitate the discharge of sludge.

[0078] In some embodiments, a drain valve 44 is further provided on the main pipeline 411 , which is disposed upstream of the sewage pump 43 to prevent unnecessary system flow loss in case of an unexpected shutdown of the sewage pump 43 .

[0079] Furthermore, the steam trap 44 can be electrically connected to the sewage pump 43 to achieve interlocking opening. It can also be set to a power-off logic, so that the downstream equipment can be isolated and repaired in the event of system failure or sewage pump 43 failure.

[0080] In some embodiments, the sludge flushing and discharge system 1 may also be provided with a sludge conveyor 60 for discharging the sludge in the sludge temporary storage box 45 .

[0081] In some embodiments, the backwash line 50 includes a backwash pipe 51 , an output end of which is connected to the sludge flushing pipe 41 .

[0082] Specifically, it can be connected to the main pipeline 411, or it can be connected to one of the branch pipelines. It should be understood that the position where it is connected needs to be between the steam trap 44 and the sewage valve 46, so as to control the backwashing.

[0083] The sludge flushing process is further explained below:

[0084] After a general seawater cooling system has been running for a long time, the silt impurities in the seawater are deposited in the silt collection chamber 420 of the silt collector 42 of the silt flushing system 1 due to gravity. At this time, the silt collection and flushing operation can be performed by the sewage pump 43 of the silt flushing pipeline 40 in two control modes: automatic or manual.

[0085] In the manual control mode, the drain valve 46 is kept open, and the sludge accumulation in the sludge collection chamber 420 can be observed through the sludge observation window 4211. When it is determined that sludge flushing is required, the drain pump 43 is manually started, and the drain valve 44 is opened, so that the sludge in the sludge collection chamber 420 is transported to the sludge temporary storage box 45 and transported and processed by the sludge conveyor 60.

[0086] In the automatic control mode, the drain valve 46 is kept open, and the sludge accumulation can be monitored by the mud level sensor 427. When the sludge reaches the target mud level, the mud level sensor 427 sends an alarm signal to the drain pump 43, the drain pump 43 starts, and the steam trap 44 is opened in a chain, so that the sludge in the sludge collection chamber 420 is transported to the sludge temporary storage box 45 and transported and processed by the sludge conveyor 60.

[0087] It should be understood that when collecting and flushing sludge, it is necessary to ensure that the system's pressure sensor signal is shielded to avoid misjudgment of the system.

[0088] The backwashing process is further described below:

[0089] After sediment has been deposited in the pipeline for a long time, it will form clogged sediments inside the pipeline, and it is difficult to pump it out by the sewage pump 43. Backwashing and unblocking are required at this time. First, keep the drain valve 44 and the sewage pump 43 closed, and keep the sewage valve 46 open. At the same time, in order to avoid damage to the instruments in the differential pressure measurement pipeline during the backwashing process, the isolation valves 428 on the instrument pipe 426 need to be closed. After the preparation is completed, a high-pressure flushing water pump is connected to the inlet end of the backwashing pipe 51 of the backwashing line 50, so that the high-pressure water flows from the backwashing pipe 51 into the silt flushing pipeline 40, and the clogged sediments are backwashed into the main line 2 of the general seawater cooling system.

[0090] It can be understood that the above embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A sludge flushing system, characterized in that: include: A sludge flushing pipeline (40) for connecting to a main pipeline (2) of a general seawater cooling system, the sludge flushing pipeline (40) comprising at least two sludge collectors (42); the sludge collectors (42) are located at the inlet end of the sludge flushing pipeline (40) and define a sludge collection chamber (420) for connecting to the main pipeline (2); and At least one differential pressure measuring pipeline for detecting the differential pressure between two points of the main pipeline (2); the differential pressure measuring pipeline is arranged between the two sludge collectors (42) and is connected to the two points of the main pipeline (2) through the two sludge collectors (42).

2. The sludge flushing and drainage system according to claim 1, characterized in that: The sludge collector (42) comprises a main shell (421) and an instrument pipe (426); the main shell (421) is vertically arranged and defines the sludge collection chamber (420); the instrument pipe (426) is arranged on the side wall of the main shell (421) and is connected to the sludge collection chamber (420); the upper end of the main shell (421) is connected to the main pipeline (2), and the differential pressure measuring pipeline is connected to the instrument pipe (426).

3. The sludge flushing and drainage system according to claim 2, characterized in that: The side wall of the main housing (421) is provided with at least one sludge observation window (4211).

4. The sludge flushing and drainage system according to claim 2, characterized in that: The sludge collector (42) further comprises a connecting pipe (422), a first reducing pipe (423) and a second reducing pipe (424); the first reducing pipe (423) is connected between the main line (2) and the connecting pipe (422); the second reducing pipe (424) is connected between the connecting pipe (422) and the main shell (421); the diameter of the connecting pipe (422) is smaller than the diameters of the main line (2) and the main shell (421).

5. The sludge flushing and drainage system according to claim 4, characterized in that: The connecting pipe (422) is arranged to be inclined, and its inclination angle is less than or equal to 45°.

6. The sludge flushing and drainage system according to claim 2, characterized in that: The sludge collector (42) further comprises a sludge level sensor (427) for detecting the height position of sludge in the sludge collection chamber (420); the sludge level sensor (427) is arranged on the main housing (421).

7. The sludge flushing and drainage system according to claim 6, characterized in that: The sludge flushing pipeline (40) further comprises a sludge flushing pipeline (41), a sewage pump (43) and a sludge temporary storage box (45); the sludge flushing pipeline (41) is connected to the lower end of the at least one sludge collector (42); the sewage pump (43) and the sludge temporary storage box (45) are arranged on the sludge flushing pipeline (41); the mud level sensor (427) is electrically connected to the sewage pump (43).

8. The sludge flushing and drainage system according to claim 2, characterized in that: The differential pressure measuring pipeline comprises at least one switch pressure gauge and at least one analog pressure gauge, and the switch pressure gauge and the analog pressure gauge are arranged in parallel; The number of the instrument connecting pipes (426) is at least two, and the ends of the at least one switch pressure gauge and the at least one analog pressure gauge are respectively connected to the sludge collection chamber (420) through at least two of the instrument connecting pipes (426).

9. The sludge flushing and drainage system according to claim 1, characterized in that: The sludge flushing and drainage system further comprises a backwashing pipeline (50) for backwashing the sludge flushing and drainage pipeline (40), and an outlet end of the backwashing pipeline (50) is connected to the sludge flushing and drainage pipeline (40).

10. The sludge flushing and drainage system according to claim 1, characterized in that: The main pipeline (2) comprises a main pipeline (201), a backwash filter (204) and a heat exchanger (203) located downstream of the backwash filter (204); the backwash filter (204) and the heat exchanger (203) are both arranged on the main pipeline (201); The differential pressure measuring pipeline comprises a first differential pressure measuring pipeline (20) and a second differential pressure measuring pipeline (30), wherein the first differential pressure measuring pipeline (20) is used to detect the differential pressure between the main pipeline (201) at both ends of the backwash filter (204), and the second differential pressure measuring pipeline (30) is used to detect the differential pressure between the main pipeline (201) at both ends of the heat exchanger (203).

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